The latest P-07 mags have thicker springs in them. They work fine with the +2's, At least for me. I was unable to get 15 rounds into the standard mag with the uplula. After 14, I had to muscle the last one in. With the +2's I can load 17 with the Uplula without any drama. As others have mentioned, they look great on the 07, and mine has a lanyard loop to help take up some space behind them. The all black gun looks like the +2's are part of the grip design, I like it.
